Patent US3225082A successfully refreshed from Google Patents.
US3225082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-carboalkoxy-4-cyano-1-butene production
Assignee: Shell USA Inc
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Filing: 1963-05-13
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Granted: 1965-12-21
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Expires: 1983-05-13
Abstract
No abstract record available.
Inventors
- 👤 James D Mcclure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:01
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
THE PROCESS FOR THE PRODUCTION OF 2-CARBOALKOXY-4CYANO-1-BUTENE BY REACTING ACRYLONITRILE AND ALKY ACRYLATE OF THE FORMULA
Claim 2
Dependent Claim
16 words
THE PROCESS FOR THE PRODUCTION OF 2-CARBOALKOXY-4CYANO-1-BUTENE BY REACTING ACRYLONITRILE AND ALKY ACRYLATE OF THE FORMULA
References Cited (Backward Citations)
US2391251A
Cited
US3074999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |